通海阀在船舶海水系统中应用广泛，高压差条件下通海阀振动噪声问题突出。在大压差工况下，对某船海水系统通海阀内部流动进行分析。考虑海水对管道振动的影响，计算通海阀的结构“湿模态”。基于流场和模态数值计算结果，采用声学边界元法对该通海阀流噪声和流激振动噪声分别进行数值计算。将流激振动辐射噪声数值计算结果与流噪声数值计算结果对比，结果表明通海阀结构振动产生的辐射噪声较流噪声小100 dB以上，即流激振动噪声完全湮没在流噪声中，对该系统通海阀噪声进行治理时应该优先考虑流噪声。
The sea valve is widely used in marine seawater system, of which vibration and noise is significant especially under high pressure condition. Under the condition of high pressure and large flux, the paper analyzed the internal flow of a ship's sea valve.And the paper calculated the "wet mode" after considering the sea water's influence on pipe vibration. The acoustic boundary element method was used to analyze the flow noise and flow induced vibration noise of the sea valve based on the numerical calculation results of flow field and modal. The results of the numerical simulation of the flow induced vibration radiation noise were compared with that of the flow noise, which suggested that the radiation noise generated by the structural vibration of the sea valve was completely submerged in the flow noise. So, the flow noise should be paid the utmost attention to while dealing with the flow induced noise.
2018,40(3): 30-34 收稿日期：2017-04-07
DOI：10.3404/j.issn.1672-7649.2018.03.006
分类号：U661
作者简介：方超(1991-),男,硕士研究生,研究方向为船舶系统减振降噪
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